CN111457135B - Safety valve of water heater and water heater using same - Google Patents
Safety valve of water heater and water heater using same Download PDFInfo
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- CN111457135B CN111457135B CN202010267512.XA CN202010267512A CN111457135B CN 111457135 B CN111457135 B CN 111457135B CN 202010267512 A CN202010267512 A CN 202010267512A CN 111457135 B CN111457135 B CN 111457135B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/18—Check valves with actuating mechanism; Combined check valves and actuated valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0486—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with mechanical actuating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The safety valve of the water heater consists of a one-way valve and a pressure relief safety valve connected to the side surface of the one-way valve, and is characterized in that: a pressure relief opening is formed in the side face of the one-way valve and positioned at the inlet of the pressure relief safety valve, and the periphery of the pressure relief opening protrudes towards one side of the pressure relief safety valve to form a sealing opening; the pressure relief safety valve comprises a main valve body, a main valve core in a circular cake shape is installed in the main valve body, one side, far away from the pressure relief opening, of the main valve core is connected with a cylindrical auxiliary valve body, and auxiliary valve cores are installed in the main valve core and the auxiliary valve body; a pressure relief water outlet is formed in the downward position of the side surface of the main valve body; the inner wall of the main valve body is provided with a valve core reset delay groove, and the side surface of the main valve core is provided with a limit clamp protrusion clamped into the valve core reset delay groove. The safety valve has stable sealing, long service life and low possibility of water leakage. The water heater is provided with the safety valve of the water heater. The safety is higher, the water leakage is possibly smaller, and the service life is longer.
Description
Technical Field
The invention relates to the field of water heaters, in particular to a safety valve of a water heater and a water heater using the safety valve.
Background
The safety valve is automatically opened and closed according to the working pressure of the pressure system, and is generally arranged on equipment or a pipeline of a closed system for protecting the safety of the system. When the pressure in the equipment or the pipeline exceeds the set pressure of the safety valve, the safety valve automatically opens to release the pressure, so that the normal work of the equipment and the pipeline is ensured, accidents are prevented, and the loss is reduced.
Most of the existing safety valves installed on the water inlet of a water heater are sealed in a mode of compressing a valve core provided with a sealing gasket and a pressure relief valve port with an annular bulge, and the valve core is pushed open to drain water and relieve pressure when the water pressure in the water heater is too high. However, as the flow rate of the pressure relief valve port is larger, the valve core is slightly opened to discharge more water, so that not only is hot water wasted, but also the water collecting container is frequently filled with water and needs to be frequently disassembled for pouring; in addition, when the water pressure is unstable, the vibration of the valve core can cause the sealing gasket and the pressure relief valve port to be opened and closed frequently, the sealing gasket is lost, and the leakage of the safety valve can be caused after the matching is not tight.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a safety valve of a water heater, and correspondingly, the invention also provides the water heater provided with the safety valve. The safety valve of the invention is additionally provided with the seal of the auxiliary valve core and the auxiliary valve body on the basis of the seal of the main valve core and the main valve body, wherein the auxiliary valve core and the auxiliary valve body are used for low-pressure relief and play a role of throttling, the smaller the pressure is, the better the throttling effect is, thereby ensuring the pressure safety and simultaneously reducing the discharge waste of hot water, reducing the opening frequency of the main valve core and prolonging the service life of the safety valve; in addition, the cooperation of the limiting clamping protrusion and the valve core resetting delay groove enables the main valve core to reset after being opened to the bottom, so that the main valve core cannot shake back and forth due to unstable pressure, the opening frequency of the main valve core is reduced, the collision speed of the main valve core and a sealing port is reduced, the sealing stability is ensured, the service life is prolonged, and the possibility of water leakage of a safety valve is reduced.
For the safety valve, the specific technical scheme of the invention is as follows: the utility model provides a relief valve comprises check valve and the pressure release relief valve who connects in the check valve side, its characterized in that: a pressure relief opening is formed in the side face of the one-way valve and positioned at the inlet of the pressure relief safety valve, and the periphery of the pressure relief opening protrudes towards one side of the pressure relief safety valve to form a sealing opening; the pressure relief safety valve comprises a main valve body, a main valve core in a circular cake shape is installed in the main valve body, one side, far away from the pressure relief opening, of the main valve core is connected with a cylindrical auxiliary valve body, and auxiliary valve cores are installed in the main valve core and the auxiliary valve body; a pressure relief water outlet is formed in the downward position of the side surface of the main valve body; the inner wall of the main valve body is provided with a valve core reset delay groove, and the side surface of the main valve core is provided with a limit clamp protrusion clamped into the valve core reset delay groove.
Therefore, when the pressure in the water heater reaches a certain degree, the auxiliary valve core is opened relative to the auxiliary valve body to release pressure, the flow rate of opening between the auxiliary valve core and the auxiliary valve body is small, and less water is discharged; in rare cases, the pressure in the water heater suddenly rises, the auxiliary valve core is opened to the bottom at the moment, the flow rate cannot be increased any more, the main valve core is pushed by large water pressure to further release pressure so as to ensure safety, and the reduction of the opening frequency of the main valve core can prolong the service life of the pressure release safety valve; the matching of the limiting clamping protrusion and the valve core resetting delay groove ensures that the main valve core is reset after being opened to the bottom, so that certain time delay exists, the main valve core cannot shake back and forth due to the change of pressure, the opening frequency of the main valve core is reduced, the collision speed of the main valve core and the sealing port is reduced, the sealing stability is ensured, the service life is prolonged, and the possibility of water leakage of the safety valve is reduced.
Preferably, one end of the main valve body, which is far away from the pressure relief port, is provided with a pressure regulating spring seat in threaded fit with the main valve body, the tail of the auxiliary valve body penetrates through a central hole of the pressure regulating spring seat to form clearance fit, and a main overflow spring is arranged on the periphery of the auxiliary valve body and positioned between the main valve core and the pressure regulating spring seat.
Therefore, the main overflow spring provides pre-tightening force for the main valve core to press the sealing port to form sealing, and the pressure regulating spring seat can adjust the pre-tightening force of the main overflow spring and adjust the pre-tightening force according to safety pressure requirements of different water heaters.
Preferably, the main valve core comprises a sealing part located on an inner ring and a rotating part located on an outer ring, the limiting clamp is convexly connected to the side surface of the rotating part, the sealing part and the rotating part are concentric and are connected through a bearing, the rotating part can rotate relative to the sealing part, a low-pressure relief hole is formed in the middle of the sealing part, a sealing groove is formed in the end face, opposite to the sealing opening, of the sealing part, the periphery of the low-pressure relief hole, a main sealing gasket is installed in the sealing groove, and a straight-through high-pressure through hole is formed in the periphery of the sealing part.
Therefore, the rotating part can rotate relative to the sealing part, so that the resistance is small when the limiting clamping protrusion is clamped into the valve core resetting delay groove and moves in the inner circumferential direction of the groove; the low-pressure relief hole is used for relieving and throttling the minimum safety pressure of the water heater, so that the loss of hot water is reduced while the safety is ensured; the main sealing gasket and the sealing port are extruded to form the seal of the main valve core; because the main valve element realizes the reset delay effect in order to be matched with the valve element reset delay groove, the clearance between the periphery of the main valve element and the main valve body is smaller, and the through-flow effect is poor, the sealing part is provided with the high-pressure through-flow hole to ensure that the pressure relief and the through-flow of the main valve element are smooth under the high-pressure opening condition.
Preferably, the low-pressure relief hole is divided into a throttle valve seat section, a sealing groove section, a sealing limit transition section and a threaded connection section from the pressure relief opening to the direction of the auxiliary valve body; the auxiliary valve body is located the outside of main valve element one end be equipped with the external screw thread that the threaded connection section cooperation is connected, inside is equipped with auxiliary valve element accommodation hole, auxiliary valve element accommodation hole with sealed spacing changeover portion hole links up the transition, the low pressure through-flow hole has been seted up to auxiliary valve element accommodation hole side.
Therefore, the auxiliary valve body and the main valve core are coated with thread glue at the connecting thread position to be assembled so as to ensure the connecting strength, when the internal pressure of the water heater is reduced to the minimum safe pressure, the auxiliary valve core is opened, hot water flows into the auxiliary valve core accommodating hole through the low-pressure relief hole, is discharged from the low-pressure through hole and is finally discharged out of the safety valve through the pressure relief water outlet.
Preferably, the diameter of the throttling valve seat section is smaller than that of the sealing limit transition section, the diameter of the sealing limit transition section is smaller than that of the bottom of the sealing groove section, and an auxiliary sealing gasket is clamped and mounted in the sealing groove section.
Therefore, the throttling valve seat section is used for throttling to reduce hot water discharge and has the function of a valve seat, the inner diameter of the auxiliary sealing gasket is equivalent to that of the throttling valve seat section, sealing is formed when the auxiliary valve core is not opened, and the auxiliary sealing gasket is clamped into the sealing groove section to be installed and can be prevented from falling off.
Preferably, the auxiliary valve core comprises a conical valve core at the head and a limiting rod at the tail, an auxiliary overflow spring which is abutted between the large circular end face of the conical valve core and the bottom of the hole of the accommodating hole of the auxiliary valve core is arranged around the limiting rod, and the conical surface of the conical valve core is abutted against the auxiliary sealing gasket to form sealing in a natural state.
Therefore, the flow rate of the throttling valve seat section is slowly increased in the opening process of the conical valve core, and is positively correlated with the pressure of low-pressure leakage flow in the water heater, so that the pressure relief range of the auxiliary valve core and the low-pressure relief hole is enlarged, and the adaptability of the auxiliary valve core and the low-pressure relief hole is stronger; the conical valve core and the auxiliary sealing gasket adopt a conical surface sealing mode, the sealing performance is good, the pressure intensity borne by the auxiliary sealing gasket is small, the service life of the auxiliary sealing gasket can be prolonged, and the possibility of water leakage of the safety valve is reduced.
Preferably, when the auxiliary valve core is opened under the action of water pressure and the limiting rod is abutted against the bottom of the auxiliary valve core accommodating hole, the force of the compressed auxiliary overflow spring is not greater than the pre-tightening force of the main overflow spring when the main valve core is closed.
Therefore, the main valve core can be opened only when the pressure relief effect cannot be achieved after the auxiliary valve core is completely opened, so that the auxiliary valve core is guaranteed to be firstly relieved to reduce the loss of hot water and prolong the service life of the safety valve.
Preferably, the valve core reset delay slot comprises a valve core opening straight line segment and a valve core reset curve segment, and the valve core reset curve segment is connected with the valve core opening straight line segment end to form an annular slot.
Therefore, when the main valve core is opened, the limiting clamping bulge passes through the valve core opening straight line section so as to ensure the pressure relief speed; when the main valve core is reset, the limiting clamp bulges pass through the valve core reset curve section, so that the reset stability is ensured, and the vibration and the impact are reduced.
Preferably, the valve core opening straight-line segment and the valve core resetting curve segment are close to the inner ring in the pressure relief opening direction and are connected to an opening path selection point, and the inner ring is connected to a resetting path selection point in the direction far away from the pressure relief opening; the limiting side edge of the outer ring of the valve core resetting delay groove, which is closest to the pressure relief port, is closer to the valve core opening straight line segment relative to the opening path selection point, and the limiting side edge of the outer ring of the valve core resetting delay groove, which is farthest from the pressure relief port, is closer to the valve core resetting curve segment relative to the resetting path selection point.
Therefore, the setting positions of the opening path selection point and the resetting path selection point can ensure that the limiting clamp boss runs along the valve core opening straight line segment when the main valve core is opened and runs along the annular route of the valve core resetting curve segment when the main valve core is reset.
For a water heater, the technical scheme of the invention is as follows: a water heater is provided with the safety valve of the water heater.
Therefore, the water heater is safer after the safety valve is installed, water leakage is possibly smaller, and the service life is longer.
In conclusion, the invention has the following beneficial effects:
the safety valve of the invention is additionally provided with the seal of the auxiliary valve core and the auxiliary valve body on the basis of the seal of the main valve core and the main valve body, wherein the auxiliary valve core and the auxiliary valve body are used for low-pressure relief and play a role of throttling, the smaller the pressure is, the better the throttling effect is, thereby ensuring the pressure safety and simultaneously reducing the discharge waste of hot water, reducing the opening frequency of the main valve core and prolonging the service life of the safety valve; in addition, the cooperation of the limiting clamping protrusion and the valve core resetting delay groove enables the main valve core to reset after being opened to the bottom, so that the main valve core cannot shake back and forth due to unstable pressure, the opening frequency of the main valve core is reduced, the collision speed of the main valve core and a sealing port is reduced, the sealing stability is ensured, the service life is prolonged, and the possibility of water leakage of a safety valve is reduced.
Drawings
FIG. 1 is a cross-sectional view of a safety valve of the present invention;
FIG. 2 is a cross-sectional view of the main spool of the relief valve of the present invention;
FIG. 3 is a groove-shaped view of a spool reset delay slot when the main spool of the safety valve of the present invention begins to open;
FIG. 4 is a groove-shaped view of a spool reset delay groove when the main spool of the safety valve of the present invention begins to reset;
in the figure, 1-one-way valve, 11-pressure relief port, 111-sealing port, 2-pressure relief valve, 21-main valve body, 211-pressure relief drain port, 212-valve core reset delay slot, 2121-valve core opening straight line segment, 2122-valve core reset curve segment, 2123-opening path selection point, 2124-reset path selection point, 22-main valve core, 221-limit clamp projection, 222-low pressure relief hole, 222 a-throttle valve seat segment, 222 b-sealing groove segment, 222 c-sealing limit transition segment, 222 d-threaded connection segment, 223-sealing groove, 224-high pressure through hole, 22 a-sealing part, 22 b-rotating part, 23-auxiliary valve body, 231-auxiliary valve core accommodating hole, 2311-low pressure through hole, 24-auxiliary valve core, 241-conical valve core, 242-limiting rod, 25-pressure regulating spring seat, 26-main overflow spring, 27-main sealing gasket, 28-auxiliary sealing gasket and 29-auxiliary overflow spring.
Detailed Description
The invention will be further explained by means of specific embodiments with reference to the drawings.
Referring to fig. 1 and 2, the safety valve of a water heater of the present invention comprises a check valve 1 and a pressure relief safety valve 2 connected to a side surface of the check valve 1, and is characterized in that: a pressure relief opening 11 is formed in the side face of the one-way valve 1 and located at the inlet of the pressure relief safety valve 2, and the periphery of the pressure relief opening 11 protrudes towards one side of the pressure relief safety valve 2 to form a sealing opening 111; the pressure relief safety valve 2 comprises a main valve body 21, a main valve core 22 in a circular cake shape is installed in the main valve body 21, one side, far away from the pressure relief opening 11, of the main valve core 22 is connected with a cylindrical auxiliary valve body 23, and auxiliary valve cores 24 are installed inside the main valve core 22 and the auxiliary valve body 23; a pressure relief water outlet 211 is arranged at the downward position of the side surface of the main valve body 21; the inner wall of the main valve body 21 is provided with a valve core reset delay groove 212, and the side surface of the main valve core 22 is provided with a limit clamping protrusion 221 clamped in the valve core reset delay groove 212.
Therefore, when the pressure in the water heater reaches a certain degree, the auxiliary valve core 24 is opened relative to the auxiliary valve body 23 to release pressure, the flow rate of opening between the auxiliary valve core 24 and the auxiliary valve body 23 is small, and the discharged water is less; in a few cases, the pressure in the water heater suddenly rises, the auxiliary valve core 24 is opened to the bottom at the moment, the flow rate cannot be increased any more, the main valve core 22 is pushed by large water pressure to further release pressure so as to ensure safety, and the reduction of the opening frequency of the main valve core 22 can prolong the service life of the pressure release safety valve 2; the cooperation of the limiting clamping protrusion 221 and the valve core resetting delay groove 212 ensures that the main valve core 22 is reset after being opened to the bottom, so that a certain time delay exists, the main valve core 22 cannot shake back and forth due to the change of pressure, the opening frequency of the main valve core 22 is reduced, the collision speed of the main valve core 22 and the sealing port 111 is reduced, the sealing stability is ensured, the service life is prolonged, and the possibility of water leakage of the safety valve is reduced.
Referring to fig. 1 and 2, a pressure regulating spring seat 25 in threaded fit with the main valve body 21 is installed at one end of the main valve body 21 far away from the pressure relief port 11, the tail of the auxiliary valve body 23 penetrates through a central hole of the pressure regulating spring seat 25 to form clearance fit, and a main overflow spring 26 is installed on the periphery of the auxiliary valve body 23 between the main valve core 22 and the pressure regulating spring seat 25.
Therefore, the main overflow spring 26 provides a pre-tightening force for the main valve element 22 to press the sealing port 111 to form sealing, and the pressure regulating spring seat 25 can regulate the pre-tightening force of the main overflow spring 26 and regulate the pre-tightening force according to safety pressure requirements of different water heaters.
As shown in fig. 1 and 2, the main valve element 22 includes a sealing portion 22a located in an inner ring and a rotating portion 22b located in an outer ring, a limit snap 221 is connected to a side surface of the rotating portion 22b, the sealing portion 22a and the rotating portion 22b are concentric and are connected through a bearing, the rotating portion 22b can rotate relative to the sealing portion 22a, a low-pressure relief hole 222 is formed in the middle of the sealing portion 22a, a sealing groove 223 is formed in an end surface, opposite to the sealing opening 111, of the sealing portion 22a located around the low-pressure relief hole 222, a main sealing gasket 27 is installed in the sealing groove 223, and a straight-through high-pressure through hole 224 is formed in the sealing portion 22a located around the sealing groove 223.
Thereby, the rotating portion 22b can rotate relative to the sealing portion 22a, so that the resistance is small when the limiting clamp projection 221 is moved in the groove inner circumferential direction while being clamped into the spool reset delay groove 212; the low-pressure relief hole 222 is used for relieving and throttling the minimum safety pressure of the water heater, so that the loss of hot water is reduced while the safety is ensured; the squeezing of main seal 27 and seal port 111 forms the seal of main spool 22; since main valve element 22 is matched with valve element reset delay groove 212 to realize reset delay effect, the clearance between the periphery of main valve element 22 and main valve body 21 is small, and the flow effect is poor, high-pressure through-flow hole 224 is arranged on sealing portion 22a to ensure smooth pressure relief and flow through of main valve element 22 under the condition of high-pressure opening.
As shown in fig. 1 and 2, the low-pressure relief hole 222 is divided into a throttle seat section 222a, a sealing groove section 222b, a sealing limit transition section 222c and a threaded connection section 222d from the relief port 11 to the direction of the auxiliary valve body 23; the outer part of one end of the main valve element 22 of the auxiliary valve body 23 is provided with an external thread matched and connected with the threaded connection section 222d, the inner part of the auxiliary valve element 23 is provided with an auxiliary valve element accommodating hole 231, the auxiliary valve element accommodating hole 231 is connected and transited with an inner hole of the sealing limit transition section 222c, and the side surface of the auxiliary valve element accommodating hole 231 is provided with a low-pressure through hole 2311.
Therefore, the connection thread of the auxiliary valve body 23 and the main valve core 22 is coated with thread glue for assembly to ensure the connection strength, when the internal pressure of the water heater is reduced to the minimum safe pressure, the auxiliary valve core 24 is opened, hot water flows into the auxiliary valve core accommodating hole 231 through the low-pressure relief hole 222, is discharged from the low-pressure through hole 2311, and is finally discharged out of the safety valve through the pressure relief water outlet 211.
As shown in fig. 1 and 2, the diameter of the throttle seat section 222a is smaller than that of the sealing limit transition section 222c, the diameter of the sealing limit transition section 222c is smaller than that of the groove bottom of the sealing groove section 222b, and the secondary sealing gasket 28 is installed in the sealing groove section 222b in a clamped mode.
Therefore, the throttling valve seat section 222a is used for throttling to reduce hot water discharge and has the function of a valve seat, the inner diameter of the secondary sealing gasket 28 is equivalent to that of the throttling valve seat section 222a, sealing is formed when the secondary valve core 24 is not opened, and the secondary sealing gasket 28 is clamped into the sealing groove section 222b to be installed and can be prevented from falling off.
As shown in fig. 1 and 2, the auxiliary valve core 24 includes a conical valve core 241 at the head and a stopper rod 242 at the tail, an auxiliary relief spring 29 abutting against the large circular end surface of the conical valve core 241 and the bottom of the hole of the auxiliary valve core accommodating hole 231 is installed around the stopper rod 242, and the conical surface of the conical valve core 241 abuts against the auxiliary sealing gasket 28 to form a seal in a natural state.
Therefore, the flow rate of the throttle valve seat section 222a is slowly increased in the opening process of the cone valve core 241, and is positively correlated with the pressure of low-pressure leakage flow in the water heater, so that the pressure relief ranges of the auxiliary valve core 24 and the low-pressure relief hole 222 are enlarged, and the adaptability of the auxiliary valve core 24 and the low-pressure relief hole 222 is stronger; the conical valve core 241 and the auxiliary sealing gasket 28 adopt a conical surface sealing mode, so that the sealing performance is good, the pressure intensity borne by the auxiliary sealing gasket 28 is small, the service life of the auxiliary sealing gasket 28 can be prolonged, and the possibility of water leakage of the safety valve is reduced.
As shown in fig. 1, when the auxiliary spool 24 is opened under the action of water pressure and the stopper rod 242 abuts against the bottom of the bore of the auxiliary spool accommodating hole 231, the compressed force of the auxiliary relief spring 29 is not greater than the pre-tightening force of the main relief spring 26 when the main spool 22 is closed.
Therefore, main valve element 22 can be opened only when the pressure relief effect cannot be achieved after auxiliary valve element 24 is completely opened, and pressure relief is guaranteed at auxiliary valve element 24, so that the hot water loss is reduced, and the service life of the safety valve is prolonged.
As shown in fig. 1, 3 and 4, the spool reset delay slot 212 includes a spool opening straight line segment 2121 and a spool reset curved line segment 2122, and the spool reset curved line segment 2122 is connected with the spool opening straight line segment 2121 end to form an annular slot.
Therefore, when the main valve core 22 is opened, the limiting clamping bulge 221 passes through the valve core opening straight line segment 2121 to ensure the pressure relief speed; stop catch 221 passes through spool return curve segment 2122 when main spool 22 is reset to ensure stable reset and reduce shock and impact.
As shown in fig. 1, 3 and 4, the straight valve element opening segment 2121 and the curved valve element resetting segment 2122 are connected to the opening path selection point 2123 at the inner circle in the direction close to the pressure relief port 11, and connected to the resetting path selection point 2124 at the inner circle in the direction far from the pressure relief port 11; the limit side of the outer ring of the spool reset delay slot 212 closest to the relief port 11 is closer to the spool opening straight line segment 2121 than to the opening path selection point 2123, and the limit side of the outer ring of the spool reset delay slot 212 furthest from the relief port 11 is closer to the spool reset curved line segment 2122 than to the reset path selection point 2124.
Therefore, the positions of the opening path selection point 2123 and the reset path selection point 2124 can ensure that the limiting clamping protrusion 221 travels along the valve element opening straight line segment 2121 when the main valve element 22 is opened, and travels along the annular route of the valve element reset curved line segment 2122 when the main valve element 22 is reset.
The water heater can be in a gas mode or an electric heating mode, and the water inlet of the water heater is provided with the safety valve of the water heater. Therefore, the safety valve of the invention is safer after the water heater is installed, the water leakage is possibly less, and the service life is longer.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and do not limit the spirit and scope of the present invention. Various modifications and improvements of the technical solutions of the present invention may be made by those skilled in the art without departing from the design concept of the present invention, and the technical contents of the present invention are all described in the claims.
Claims (8)
1. The utility model provides a water heater relief valve, by check valve (1) with connect in pressure release relief valve (2) of check valve (1) side constitute its characterized in that: a pressure relief opening (11) is formed in the side face of the one-way valve (1) and is positioned at the inlet of the pressure relief safety valve (2), and the periphery of the pressure relief opening (11) protrudes towards one side of the pressure relief safety valve (2) to form a sealing opening (111); the pressure relief safety valve (2) comprises a main valve body (21), a round cake-shaped main valve core (22) is installed in the main valve body (21), a cylindrical auxiliary valve body (23) is connected to one side, far away from the pressure relief opening (11), of the main valve core (22), and auxiliary valve cores (24) are installed inside the main valve core (22) and the auxiliary valve body (23); a pressure relief water outlet (211) is formed in the downward position of the side surface of the main valve body (21); a valve core reset delay groove (212) is formed in the inner wall of the main valve body (21), and a limiting clamping protrusion (221) clamped into the valve core reset delay groove (212) is arranged on the side face of the main valve core (22);
a pressure regulating spring seat (25) in threaded fit with the main valve body (21) is installed at one end, far away from the pressure relief port (11), in the main valve body (21), the tail of the auxiliary valve body (23) penetrates through a center hole of the pressure regulating spring seat (25) to form clearance fit, and a main overflow spring (26) is installed between the main valve core (22) and the pressure regulating spring seat (25) on the periphery of the auxiliary valve body (23);
main valve element (22) including seal portion (22a) that is located the inner circle and rotating part (22b) that is located the outer lane, spacing protruding (221) of card connect in rotating part (22b) side, seal portion (22a) with rotating part (22b) is concentric and pass through the bearing and connect, rotating part (22b) is relative seal portion (22a) can rotate, seal portion (22a) middle part is equipped with low pressure relief hole (222), seal portion (22a) are located around low pressure relief hole (222) with seal groove (111) relative terminal surface has seted up seal groove (223), install primary seal pad (27) in seal groove (223), seal portion (22a) are located high pressure through-flow hole (224) that seal groove (223) periphery was seted up.
2. A water heater safety valve as claimed in claim 1, wherein: the low-pressure relief hole (222) is divided into a throttle valve seat section (222a), a sealing groove section (222b), a sealing limit transition section (222c) and a threaded connection section (222d) from the pressure relief port (11) to the direction of the auxiliary valve body (23); the auxiliary valve body (23) is located at the outer part of one end of the main valve core (22), is provided with an external thread matched and connected with the threaded connection section (222d), is internally provided with an auxiliary valve core accommodating hole (231), the auxiliary valve core accommodating hole (231) is in engagement transition with an inner hole of the sealing limit transition section (222c), and the side surface of the auxiliary valve core accommodating hole (231) is provided with a low-pressure through hole (2311).
3. A water heater safety valve as claimed in claim 2, wherein: the diameter of the throttling valve seat section (222a) is smaller than that of the sealing limit transition section (222c), the diameter of the sealing limit transition section (222c) is smaller than that of the bottom of the sealing groove section (222b), and an auxiliary sealing gasket (28) is installed in the sealing groove section (222b) in a clamping mode.
4. A water heater safety valve as claimed in claim 3, wherein: the auxiliary valve core (24) comprises a conical valve core (241) at the head and a limiting rod (242) at the tail, an auxiliary overflow spring (29) which is abutted between the large circular end face of the conical valve core (241) and the hole bottom of the auxiliary valve core accommodating hole (231) is arranged around the limiting rod (242), and the conical surface of the conical valve core (241) is abutted against the auxiliary sealing gasket (28) to form sealing in a natural state.
5. A water heater safety valve as claimed in claim 4, wherein: when the auxiliary valve core (24) is opened under the action of water pressure to enable the limiting rod (242) to be abutted against the bottom of the hole of the auxiliary valve core accommodating hole (231), the force of the compressed auxiliary overflow spring (29) is not greater than the pre-tightening force of the main overflow spring (26) when the main valve core (22) is closed.
6. A water heater safety valve as claimed in claim 1, wherein: the valve core resetting delay groove (212) comprises a valve core opening straight line section (2121) and a valve core resetting curved section (2122), and the head and the tail of the valve core resetting curved section (2122) are respectively connected with the head and the tail of the valve core opening straight line section (2121) to form an annular groove.
7. A water heater safety valve as claimed in claim 6, wherein: the inner rings of the valve core opening straight-line segment (2121) and the valve core resetting curved-line segment (2122) close to the pressure relief port (11) are intersected with an opening path selection point (2123), and the inner rings far away from the pressure relief port (11) are intersected with a resetting path selection point (2124); the limiting side edge of the outer ring of the valve core resetting delay groove (212), which is closest to the pressure relief port (11), is closer to the valve core opening straight line section (2121) relative to the opening path selection point (2123), and the limiting side edge of the outer ring of the valve core resetting delay groove (212), which is farthest from the pressure relief port (11), is closer to the valve core resetting curved line section (2122) relative to the resetting path selection point (2124).
8. A water heater, characterized in that: the water heater is provided with a safety valve of the water heater as claimed in any one of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010267512.XA CN111457135B (en) | 2020-04-08 | 2020-04-08 | Safety valve of water heater and water heater using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010267512.XA CN111457135B (en) | 2020-04-08 | 2020-04-08 | Safety valve of water heater and water heater using same |
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| Publication Number | Publication Date |
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| CN111457135A CN111457135A (en) | 2020-07-28 |
| CN111457135B true CN111457135B (en) | 2021-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010267512.XA Active CN111457135B (en) | 2020-04-08 | 2020-04-08 | Safety valve of water heater and water heater using same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113898766A (en) * | 2021-09-09 | 2022-01-07 | 精工阀门集团有限公司 | Check valve with buffering pressure relief mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3106937A (en) * | 1960-01-13 | 1963-10-15 | Sands Asa Dewitt | Safety cut-off valve requiring reset by pressure equalization |
| CN201391656Y (en) * | 2009-04-23 | 2010-01-27 | 浙江恒翔实业发展有限公司 | Pressure valve |
| CN103032612A (en) * | 2012-12-12 | 2013-04-10 | 中国航天科技集团公司第六研究院第十一研究所 | Dual-opening-pressure dual-displacement safety valve |
| CN108131473A (en) * | 2018-01-31 | 2018-06-08 | 浙江神太太阳能股份有限公司 | The check valve of decompression function built in a kind of band |
| CN207599058U (en) * | 2017-10-19 | 2018-07-10 | 浙江华益精密机械股份有限公司 | Safety valve |
-
2020
- 2020-04-08 CN CN202010267512.XA patent/CN111457135B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3106937A (en) * | 1960-01-13 | 1963-10-15 | Sands Asa Dewitt | Safety cut-off valve requiring reset by pressure equalization |
| CN201391656Y (en) * | 2009-04-23 | 2010-01-27 | 浙江恒翔实业发展有限公司 | Pressure valve |
| CN103032612A (en) * | 2012-12-12 | 2013-04-10 | 中国航天科技集团公司第六研究院第十一研究所 | Dual-opening-pressure dual-displacement safety valve |
| CN207599058U (en) * | 2017-10-19 | 2018-07-10 | 浙江华益精密机械股份有限公司 | Safety valve |
| CN108131473A (en) * | 2018-01-31 | 2018-06-08 | 浙江神太太阳能股份有限公司 | The check valve of decompression function built in a kind of band |
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| CN111457135A (en) | 2020-07-28 |
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